CN103580096A - Systems and methods of direct cell attachment for batteries - Google Patents
Systems and methods of direct cell attachment for batteries Download PDFInfo
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- CN103580096A CN103580096A CN201310311285.6A CN201310311285A CN103580096A CN 103580096 A CN103580096 A CN 103580096A CN 201310311285 A CN201310311285 A CN 201310311285A CN 103580096 A CN103580096 A CN 103580096A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00308—Overvoltage protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
- H02J7/00718—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current in response to charge current gradient
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
- H02J7/007184—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage in response to battery voltage gradient
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to systems and methods of direct cell attachment for batteries. Embodiments of the systems and methods of direct cell attachment for battery cells disclosed herein operate without the protection FETs and the protection IC, thereby enabling the direct attachment of battery cells to the system without compromising safety. A charger IC comprises a switching regulator whose output is used to charge the battery through a pass device. In example embodiments of the disclosed systems and methods of direct cell attachment, a combination of switching FETs and the pass device are used as a protection device instead of the charge and discharge FETs. During normal operation, the pass device may be used to charge the battery using the traditional battery charging profile. Under fault condition, the switching FETs and pass device may be driven appropriately to protect the system.
Description
The cross reference of related application
The application requires the interests of the U.S. Provisional Patent Application 61/675,617 of submission on July 25th, 2012, and it merges to this by reference.
Technical field
The disclosure relates in general to battery, more specifically, relates to battery pack protection.
Background technology
Lithium ion (Li-ion) has become the main rechargeable battery chemical composition such as the consumer-elcetronics devices of smart mobile phone and notebook computer, and becomes and be in daily use for industry, transportation and electric power storage application.Lithium ion battery chemical composition is different from other rechargeable battery chemical compositions in many aspects, for example nickel metal hydride [NiMH], NI-G [NiCad] and plumbic acid.From technical standpoint, due to high-energy-density, lithium-ion technology is for example, for whole portable set family, smart mobile phone.From the view of security, high-energy-density adds that inflammable organic substance rather than traditional Water-Electrolyte have produced many protection challenges.Concrete challenge comprises the battery design that contains lithium ionic cell unit and the Storage and Processing of these batteries.
Single lithium ionic cell unit will have the voltage range of a safety, and it can be in this voltage range cocycle, and this voltage range is determined by concrete battery unit chemical composition.The voltage range of safety will be following scope, and within the scope of this, battery unit electrode can not degenerated fast due to lithium plating, copper dissolution or other undesirable reactions.For most of battery units, the charging that is significantly higher than 100% charged state can cause the quick heat release of electrode to be degenerated.Charging is called as and overcharges higher than the high voltage specification of manufacturer.Because overcharge, can cause violent thermal runaway reaction, therefore much additives for overcharge protection equipment is designed into or is included in the Electronic Protection encapsulation of lithium ion battery group.
Lithium ion battery (or battery pack) is to be made by the protection electronic circuit of one or more single batteries and their associations.By the battery unit that is connected in parallel, designer has increased battery capacity.By series connected battery unit, increased battery voltage.
Conventionally, energy failures causes thermal runaway.Battery unit thermal runaway refers to by highly oxidized positive electrode and the quick of the battery unit that highly heat-producing chemical reaction of the negative electrode of reduction causes heated certainly; It can occur in the battery of any chemical composition almost.
If overheated or overcharge, lithium ion battery is broken by thermal runaway and battery unit may.Extreme in the situation that, this can cause burning.Deep discharge may make battery unit short circuit, and in this case, recharging will be dangerous.In order to reduce these risks, lithium ion battery group comprises fail safe circuit, and when the voltage of battery is outside the safe range of every battery unit 3-4.2V, this fail safe circuit is closed battery.When long storage time, the little electric current that protective circuit itself consumes may be closed below voltage by running down of battery to it; Normal charger is inoperative.Permitted eurypalynous lithium ionic cell unit can not safe charging below 0 ℃.
Critical piece together with battery pack is battery management circuit.Conventionally, battery management module (BMU) forms (Fig. 1) by charger and fuel meter.Lithium ion battery group itself is by lithium ionic cell unit, protection IC and protection FET(charging (CHG) and electric discharge (DSG)) form.Protective circuit takies the useful space in battery unit, has increased extra failpoint, and irreversibly forbids battery unit when being activated.They are essential, because in use anode produces heat, and negative electrode may produce oxygen.These devices and improved electrode design have reduced/have eliminated the risk of fire or blast.In addition, compare with nickel metallic hydrogen battery, these features have increased cost, because nickel metallic hydrogen battery only needs hydrogen/oxygen multiple device (preventing due to the slight damage of overcharging and causing) and standby pressure valve.
The function of protection IC is, when lithium ionic cell unit voltage or electric current stride across criticality safety threshold value, to open protection switch and lithium ion battery group is separated from system.Various threshold limit values are included in overcurrent between charge period, at the overcurrent of interdischarge interval, overvoltage between charge period, at under-voltage, short circuit, excess Temperature and the reverse current at interdischarge interval of interdischarge interval.
Some systems are used the battery pack of non-removable now.Yet, generally still use conventional battery pack side protection.This makes some circuit redundancies and has increased mechanical constraint.Protection FET and protection IC have increased suitable cost to battery pack.In addition, the PCB for the protection of FET and protection IC has increased weight, size, built-up time and testing time.There is the demand not being resolved up to now in these previous solutions.
Summary of the invention
Exemplary embodiment of the present disclosure is provided for the system of the direct battery unit connection of battery.Briefly; in framework; the exemplary embodiment of this system can be implemented as follows except other: battery protecting circuit; it comprises: be arranged in series in the battery transistor between charging source and battery; battery transistor is also arranged in series between load and battery; battery transistor is further configured to during normal condition, battery be charged, and is configured to protect load during fault state, and battery transistor is further configured in the outside of the battery pack of holding battery.
Embodiment of the present disclosure also can be considered as being provided for the method that the direct battery unit of battery connects.In this respect, this method embodiment can roughly conclude through the following steps except other: the fault state of determining battery pack; With the battery transistor protection battery with battery pack outside, transistor series is connected between battery pack and charger.
Accompanying drawing explanation
Fig. 1 is the system block diagram of exemplary embodiment of the battery protecting circuit of prior art.
Fig. 2 is the system block diagram for the exemplary embodiment of the system of the direct battery unit connection of battery.
Fig. 3 is the circuit diagram of exemplary embodiment of the system of Fig. 2.
Fig. 4 is the circuit diagram of the transistorized exemplary embodiment of battery of Fig. 3.
Fig. 5 is the circuit diagram for the exemplary embodiment of the transistorized back grid control circuit of Fig. 4.
Fig. 6 is the flow chart for the method for the direct battery unit connection of battery.
Fig. 7 is the system block diagram for the exemplary embodiment of the system of the direct battery unit connection of battery.
Embodiment
More fully describe with reference to the accompanying drawings embodiment of the present disclosure, wherein, in some accompanying drawings, like numerals will represents like, and wherein shows exemplary embodiment.Yet the embodiment of claim can be with multi-form embodiment, and should not be construed and be limited to the embodiment of statement here.Here the example of statement is non-limiting example, and is only the example in other possibility examples.Although the transistor of accompanying drawing is provided as field-effect transistor (FET), according to application, can use other transistors.In addition,, although the FET in accompanying drawing is provided as n channel fet, according to application, also can use p channel fet.
The circuit 100 of Fig. 1 provides the example of prior art.Battery pack 120 comprises battery unit 150 and printed circuit board (PCB) (PCB) 160, and PCB has protection IC170, charging transistor 180 and discharge transistor 190.Charging transistor 180 and discharge transistor 190 connect (in line with) battery unit 150.Battery management module (BMU) 130 is positioned on the system board 110 of battery pack 120 outsides.BMU130 comprises fuel meter and has the charger circuit of battery transistor 140.The fuel meter of BMU130 is determined the residual life of battery pack 120, and charger charges to battery pack 120.PCB160 and BMU130 in battery pack 120 inside separate.
Fig. 2 provides the exemplary embodiment of the disclosed system connecting for the direct battery unit of battery.Circuit 200 comprises battery cell unit 220 and system board 210.The system board 210 that comprises BMU230, battery transistor 240 and defencive function 250 is can be presented as the stacks of cells with a plurality of battery units at battery unit 220(battery unit 220) outside.Having protection IC and the transistorized PCB of charging and discharging removes from battery pack.Disclosed system and method can and be used on any battery chemistries composition with safety problem for any battery-operated system.Battery pack side instrument is placed in BMU, and in battery pack side instrument, protection is in the whole PCB part (protection IC, electric discharge FET and charging FET) in battery pack itself and battery pack.
The embodiment of the system and method connecting for the direct battery unit of battery disclosed herein operates the in the situation that of unprotect FET and protection IC; thereby make lithium ionic cell unit that system (as provided in Fig. 2) can be provided, and sacrificing security not.As the charger IC providing in Fig. 3 comprises switching regulaor, its output (SYS) is for charging to battery (BAT) by transmitting device (BATFET).
In the exemplary embodiment of disclosed direct battery unit connected system and method, the combination of transistor (switch and/linear unit) and transmission device (BAT FET) is used as protection device, rather than charging and discharging FET.In the normal operation period, transmitting device can be for using traditional lithium ion charge mode to charge to battery.Under fault state, driving transistors and transmit device suitably, with protection system.Table 1 has been listed various fault state, and has compared the action that will take on various FET in the solution of current solution and suggestion.
Table 1
By removing circuit from battery pack, can reduce battery pack cost, because removed printed circuit board (PCB) (PCB), protection IC and protection FET.Also can greatly reduce battery weight.Can reduce battery pack size.Because there is no PCB in battery pack, so shaping battery pack again.Can reduce the series resistance in charge/discharge path.Can increase system effectiveness, because removed the power dissipation on protection FET and contact resistance.Can reduce the heat producing on protection FET and contact resistance, thereby increase battery life.Can in the system with protector, for secure threshold, realize full redundancy protection.For the system with protector, can realize second class protection.
In protection, be present in each application of battery pack, battery management module secure threshold can be set to higher than the protector in battery pack, thereby overcurrent (OCC) and the efficiency during overvoltage (OV) fault state between charge period are increased.In traditional protector, during OCC and OV, allow the body diode that passes through to transmit device from battery discharge, this resistance due to diode causes efficiency low compared with the voltage loss on high and diode.In the exemplary embodiment of disclosed system and method, BAT FET can be unlocked, and this has reduced resistance and voltage drop.
Fig. 3 provides the exemplary embodiment of battery management module circuit 300, and battery management module circuit 300 comprises input source 310, charger circuit 305, fuel meter 320, battery pack 330 and load 315.Charger circuit 305 comprises battery charger controller 315, blocking transistors 325, switching transistor 335 and 340 and transmit device or battery transistor 345.The exemplary embodiment of fuel meter 320 comprises processing unit 355, current comparator 350 and voltage comparator 360.Input source 310(is wall type power supply (wall wart) for example) by blocking transistors 325, switching transistor 335 and 345 pairs of battery pack 330 of battery transistor, charge.
For example, for protection system is avoided various safe conditions (those that list in table 1), the exemplary embodiment of the disclosed direct battery unit connected system for battery is used single nFET(to provide as Fig. 4 for transmitting device) and special control circuit.Special circuit can drive the back grid of nFET, and body diode is not opened.Fig. 5 provides the exemplary embodiment of an execution mode of sort circuit.
Table 2 provides the exemplary embodiment of the connection of body diode under various failure conditions.
Table 2
The nFET that Fig. 4 provides battery transistor 410(for example to isolate) schematic diagram, the grid of battery transistor 410, drain electrode, source electrode and body end are connected respectively to charger control 480, system voltage terminal (SYS) 450, battery terminal (BAT) 460 and back grid output (VBODY) 470.Diode D1420 and D2430 are that nFET is intrinsic.
For every kind of situation, may be different from the recovery of fault state.Under the over current fault situation between charge period, body diode node 470 is connected to battery terminal 460, and wherein D1420 is reverse biased and D2430 closes with zero (0) volt.When overcurrent condition stops, battery transistor 410 is unlocked, as a part of recovering, to allow charging.Body diode continues to be connected to battery terminal 460.Under the over current fault situation of interdischarge interval, body diode node 470 is connected to system voltage terminal 450, and wherein D1420 closes with zero (0) volt and D2430 is reverse biased.Served as stream discharge scenario while being removed, final regulating system voltage.System voltage is once adjusting, and the potential minimum in system just becomes cell voltage.Body diode node 470 is connected to battery now, and can complete and charge normal and discharge.
Under the overvoltage fault state between charge period, body diode node 470 is connected to cell voltage 460, and wherein D1420 is reverse biased and D2430 closes with zero (0) volt.In order to recover, battery transistor 410 is closed.If charger is connected to node 480, switch FET is directly to load supplying.
Under the under-voltage fault state of interdischarge interval, body diode node 470 is connected to system voltage terminal 450, and wherein D1420 closes with zero (0) volt and D2430 is reverse biased.In order to recover, system looks connects at the charger at node 480 places.Then system voltage is by rising and start battery to charge.
Under the short trouble situation of interdischarge interval, body diode node 470 is connected to system voltage terminal 450, and wherein D1420 closes with zero (0) volt and D2430 is reverse biased.In order to recover, disconnect battery terminal 460 and monitoring system voltage terminal 450.Once removal external loading, just can reconnect battery.If necessary, this device of can programming, to wait for that before battery is connected to load charger connects.
Under excess Temperature fault state, body diode node 470 is connected to system voltage terminal 450 between age at failure, and wherein D1420 closes with zero (0) volt and D2430 is reverse biased.In order to recover, temperature is monitored.When temperature declines, body diode node 470 is connected to battery terminal 460, with enabling.
Under reverse current fault state (wherein the terminal of battery is reversed), block FET together with the high side FET execution reverse current block function of switching regulaor.Body diode node 470 is connected to battery terminal 460 under normal operation.During the restore cycle, normal running does not change.
With reference now to Fig. 5,, in order to prevent body diode unlatching, back grid control circuit 500 is by the V of nFET
bODYnode 578 is driven into the lower value of system and cell voltage.This completes to produce logical signal by first compare cell voltage and system voltage with comparator 510.The power supply of comparator 510 can produce from the Voltage rails of internal regulation.
The output of logical signal can be for driving switch 550 and 560, so that system voltage or cell voltage are connected to V
bODYnode.Switch 560 and 580 can be for preventing the body diode unlatching of switch 550 and 590.Switch 550 and 560 forms a pair of back to back diode.Level shifter 520,530 and 540 can be for logical signal being transformed into suitable current potential, with driving switch.Truth table for the exemplary embodiment of back grid control circuit 500 is provided in table 3.
Table 3
Fig. 6 provides the flow chart 600 for the exemplary embodiment of the method for the direct battery unit connection of battery.In square frame 610, determine the fault state of battery pack.In square frame 620, by the battery transistor protection battery pack of battery pack outside, battery transistor series is connected between battery pack and load.
Fig. 7 provides the alternate embodiment of the direct battery unit connected system for battery with battery management module circuit 700, and battery management module circuit 700 comprises input source 710, charger circuit 705, fuel meter 720, battery pack 730 and load 715.Charger circuit 705 comprises battery charger controller 715, adjuster transistor 725 and transmits device or battery transistor 745.The exemplary embodiment of fuel meter 720 comprises processing unit 755, current comparator 750 and voltage comparator 760.Input source 710(is wall type power supply for example) by adjuster transistor 725 and 745 pairs of battery pack 730 of battery transistor, charge.In the exemplary embodiment, adjuster transistor 725 comprises that with or without oppositely blocks the switch FET of FET.In an alternative embodiment, adjuster transistor 725 comprises that with or without oppositely blocks the linear transistor of FET.In the exemplary embodiment, battery transistor 745 comprises the single FET controlling with back grid.In an alternative embodiment, battery transistor 745 comprises two FET of back-to-back configuration.
Although described the present invention in detail, should be understood that, in the situation that do not deviate from the spirit and scope of the present invention that are defined by the following claims, can carry out various changes, replacement and change to it.
Claims (20)
1. a system, it comprises:
Battery protecting circuit, it comprises:
Be arranged in series in the battery transistor between charging source and battery; described battery transistor is also arranged in series between load and described battery; described battery transistor is further configured under normal condition, described battery be charged; and be configured to protect described load during fault state, described battery transistor is further configured in the outside of the battery pack of holding described battery.
2. system according to claim 1, wherein said battery transistor comprises that two n slot field-effect transistors are FET or two p channel fets.
3. system according to claim 1; wherein battery management module is configured to control described battery transistor and at least one adjuster transistor; to protect described battery, described at least one adjuster transistor series is configured between described charging source and described load.
4. system according to claim 3, wherein
Under the overcurrent condition between charge period, described at least one adjuster transistor is closed;
Under the overcurrent condition of interdischarge interval, described battery transistor is closed;
Under the overpressure conditions between charge period, described at least one adjuster transistor is closed;
Under the under-voltage situation of interdischarge interval, described battery transistor is closed;
Under the short-circuit state of interdischarge interval, described battery transistor is closed; With
Under the situation of excess Temperature, described at least one adjuster transistor and described battery transistor are closed.
5. system according to claim 1, further comprise the blocking transistors being arranged in series between described source and described at least one adjuster transistor, described blocking transistors and described at least one adjuster transistor are configured to form a pair of back to back diode, to stop reverse current situation.
6. system according to claim 1, wherein said battery transistor comprises that single n slot field-effect transistor is nFET, the back grid of described nFET drives with control circuit, and associated body diode is not unlocked.
7. system according to claim 1, wherein said battery transistor comprises that two n slot field-effect transistors arranging with back-to-back configuration mode are nFET.
8. system according to claim 5, wherein said control circuit comprises at least one comparator, a plurality of level shifter and a plurality of switch, and described comparator, described a plurality of level shifters and described a plurality of switch are configured to the junior in described cell voltage and described system voltage to be applied to the body node of described nFET.
9. a method, it comprises:
Determine the fault state of battery pack; With
The battery transistor protection battery that is used in described battery pack outside, described battery transistor series is connected between described battery pack and charger.
10. method according to claim 9, further comprises with the blocking transistors being connected in series between load and input source and stops reverse current situation.
11. methods according to claim 9, wherein said battery transistor comprises that n slot field-effect transistor is nFET, and described method further comprises the back grid that drives described nFET, to prevent that the body diode of described nFET from opening.
12. methods according to claim 11, further comprise the back grid that drives described nFET with the junior in load voltage and cell voltage.
13. methods according to claim 12, wherein, under the overcurrent condition between charge period, are connected to described cell voltage by the back grid of described nFET;
Under the overcurrent condition of interdischarge interval, further comprise described body diode is connected to described load voltage;
Under the overpressure conditions between charge period, further comprise described body diode is connected to described cell voltage;
Under the under-voltage situation of interdischarge interval, further comprise described body diode is connected to described load voltage;
Under the short-circuit state of interdischarge interval, further comprise described body diode is connected to described load voltage;
Under the situation of excess Temperature, further comprise described body diode is connected to described load voltage; With
Under negater circuit situation, further comprise described body diode is connected to described cell voltage.
14. methods according to claim 12, junior in wherein said load voltage and described cell voltage produces by following steps: more described load voltage and described cell voltage, and the signal of generation level shift drives a plurality of transistors.
15. methods according to claim 9, further comprise by described battery transistor described battery are charged.
16. 1 kinds of systems, comprising:
Battery management module, it comprises:
Charger module, it comprises:
Battery charger controller;
At least one adjuster transistor; With
Be configured to provide the battery transistor of battery failures protection; With
Be configured to provide the fuel meter module of fault message to described charger module, described fuel meter module comprises:
Processing module;
Voltage comparator; With
Current comparator.
17. systems according to claim 16, wherein said battery transistor comprises that two n slot field-effect transistors are FET or two p channel fets.
18. systems according to claim 16, wherein
Under the overcurrent condition between charge period, described at least one adjuster transistor and described battery transistor are closed;
Under the overcurrent condition of interdischarge interval, described battery transistor is closed;
Under the overpressure conditions between charge period, described at least one adjuster transistor and described battery transistor are closed;
Under the under-voltage situation of interdischarge interval, described battery transistor is closed;
Under the short-circuit state of interdischarge interval, described battery transistor is closed; With
Under the situation of excess Temperature, described at least one adjuster transistor and described battery transistor are closed.
19. systems according to claim 16, wherein said battery transistor comprises that single n slot field-effect transistor is nFET, the back grid of described nFET drives with control circuit, and associated body diode is not unlocked.
20. systems according to claim 19, wherein said control circuit comprises at least one comparator, a plurality of level shifter and a plurality of switch, and described comparator, described a plurality of level shifters and described a plurality of switch are configured to the junior in described cell voltage and described system voltage to be applied to the body node of described nFET.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201261675617P | 2012-07-25 | 2012-07-25 | |
| US61/675,617 | 2012-07-25 | ||
| US13/898,259 | 2013-05-20 | ||
| US13/898,259 US9209632B2 (en) | 2012-07-25 | 2013-05-20 | Systems and methods of direct cell attachment for batteries |
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| Publication Number | Publication Date |
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| CN103580096A true CN103580096A (en) | 2014-02-12 |
| CN103580096B CN103580096B (en) | 2018-09-07 |
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| CN201310311285.6A Active CN103580096B (en) | 2012-07-25 | 2013-07-23 | The system and method that direct battery unit for battery connects |
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| CN (1) | CN103580096B (en) |
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| US9789319B2 (en) | 2013-11-21 | 2017-10-17 | Medtronic, Inc. | Systems and methods for leadless cardiac resynchronization therapy |
| JP6378003B2 (en) * | 2014-08-27 | 2018-08-22 | ラピスセミコンダクタ株式会社 | Semiconductor device, battery monitoring system, and semiconductor device startup method |
| US9977091B2 (en) | 2015-04-28 | 2018-05-22 | Qualcomm Incorporated | Battery fuel gauges sharing current information between multiple battery chargers |
| US10680520B2 (en) * | 2018-05-18 | 2020-06-09 | Ronald S. Davison | I/O protected buck then boost or boost then buck converter, with interleaving option |
| US10958087B2 (en) | 2018-07-21 | 2021-03-23 | Orest Fedan | Battery protection system |
| CN110071551B (en) * | 2019-05-30 | 2021-08-03 | 温州贝塔电子科技有限公司 | Overcharge protection circuit for mobile phone |
| CN112994188B (en) * | 2021-04-27 | 2021-08-06 | 上海南麟电子股份有限公司 | Reverse connection protection circuit for rechargeable battery and battery protection chip |
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Also Published As
| Publication number | Publication date |
|---|---|
| US9843204B2 (en) | 2017-12-12 |
| US20140029147A1 (en) | 2014-01-30 |
| US20160164319A1 (en) | 2016-06-09 |
| US9209632B2 (en) | 2015-12-08 |
| CN103580096B (en) | 2018-09-07 |
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